syndicate-js/examples/how-to-use-syndicatec-javascript/src/box.js

/// SPDX-License-Identifier: GPL-3.0-or-later
/// SPDX-FileCopyrightText: Copyright © 2016-2021 Tony Garnock-Jones <tonyg@leastfixedpoint.com>

import { BoxState, SetBox, N } from './protocol.js';

export function boot(ds) {
  spawn named 'box' {
    field boxValue = 0;
    at ds {
      assert BoxState(boxValue.value);
      on message SetBox($v) => boxValue.value = v;
    }
    stop on (boxValue.value === N) {
      console.log('terminated box root facet');
    }
  }
}